# ***** BEGIN GPL LICENSE BLOCK *****
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# The Original Code is Copyright (C) 2006, Blender Foundation
# All rights reserved.
#
# The Original Code is: all of this file.
#
# Contributor(s): Jacques Beaurain.
#
# ***** END GPL LICENSE BLOCK *****

#-----------------------------------------------------------------------------
# We don't allow in-source builds. This causes no end of troubles because
# all out-of-source builds will use the CMakeCache.txt file there and even
# build the libs and objects in it.

if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
	if(NOT DEFINED WITH_IN_SOURCE_BUILD)
		message(FATAL_ERROR
			"CMake generation for blender is not allowed within the source directory!"
			"\n Remove \"${CMAKE_SOURCE_DIR}/CMakeCache.txt\" and try again from another folder, e.g.:"
			"\n "
			"\n rm CMakeCache.txt"
			"\n cd .."
			"\n mkdir cmake-make"
			"\n cd cmake-make"
			"\n cmake ../blender"
			"\n "
			"\n Alternately define WITH_IN_SOURCE_BUILD to force this option (not recommended!)"
		)
	endif()
endif()

cmake_minimum_required(VERSION 3.5)

# Prever LEGACY OpenGL to eb compatible with all the existing releases and
# platforms which don't hare GLVND yet. Only do it if preference was not set
# externally.
if(NOT DEFINED OpenGL_GL_PREFERENCE)
	set(OpenGL_GL_PREFERENCE "LEGACY")
endif()

if(NOT EXECUTABLE_OUTPUT_PATH)
	set(FIRST_RUN TRUE)
else()
	set(FIRST_RUN FALSE)
endif()

# this starts out unset
list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/build_files/cmake/Modules")
list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/build_files/cmake/platform")

# avoid having empty buildtype
if(NOT DEFINED CMAKE_BUILD_TYPE_INIT)
	set(CMAKE_BUILD_TYPE_INIT "Release")
endif()

# Omit superfluous "Up-to-date" messages.
if(NOT DEFINED CMAKE_INSTALL_MESSAGE)
	set(CMAKE_INSTALL_MESSAGE "LAZY")
endif()

# quiet output for Makefiles, 'make -s' helps too
# set_property(GLOBAL PROPERTY RULE_MESSAGES OFF)

# global compile definitions since add_definitions() adds for all.
set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS
	$<$<CONFIG:Debug>:DEBUG;_DEBUG>
	$<$<CONFIG:Release>:NDEBUG>
	$<$<CONFIG:MinSizeRel>:NDEBUG>
	$<$<CONFIG:RelWithDebInfo>:NDEBUG>
)

#-----------------------------------------------------------------------------
# Set policy

# see "cmake --help-policy CMP0003"
# So library linking is more sane
cmake_policy(SET CMP0003 NEW)

# So BUILDINFO and BLENDERPATH strings are automatically quoted
cmake_policy(SET CMP0005 NEW)

# So syntax problems are errors
cmake_policy(SET CMP0010 NEW)

# Input directories must have CMakeLists.txt
cmake_policy(SET CMP0014 NEW)

#-----------------------------------------------------------------------------
# Load some macros.
include(build_files/cmake/macros.cmake)


#-----------------------------------------------------------------------------
# Initialize project.

blender_project_hack_pre()

project(Blender)

blender_project_hack_post()

enable_testing()

#-----------------------------------------------------------------------------
# Redirect output files

set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin CACHE INTERNAL "" FORCE)
set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/lib CACHE INTERNAL "" FORCE)
if(MSVC)
	set(TESTS_OUTPUT_DIR ${EXECUTABLE_OUTPUT_PATH}/tests/$<CONFIG>/ CACHE INTERNAL "" FORCE)
else()
	set(TESTS_OUTPUT_DIR ${EXECUTABLE_OUTPUT_PATH}/tests/ CACHE INTERNAL "" FORCE)
endif()

#-----------------------------------------------------------------------------
# Set default config options

get_blender_version()


#-----------------------------------------------------------------------------
# Platform Specific Defaults

# list of var-names
set(_init_vars)

# initialize to ON
macro(option_defaults_init)
	foreach(_var ${ARGV})
		set(${_var} ON)
		list(APPEND _init_vars "${_var}")
	endforeach()
	unset(_var)
endmacro()

# remove from namespace
macro(option_defaults_clear)
	foreach(_var ${_init_vars})
		unset(${_var})
	endforeach()
	unset(_var)
	unset(_init_vars)
endmacro()


# values to initialize WITH_****
option_defaults_init(
	_init_BUILDINFO
	_init_CODEC_FFMPEG
	_init_CYCLES_OSL
	_init_IMAGE_OPENEXR
	_init_INPUT_NDOF
	_init_JACK
	_init_OPENCOLLADA
	_init_OPENCOLORIO
	_init_SDL
	_init_FFTW3
	_init_OPENSUBDIV
)

# customize...
if(UNIX AND NOT APPLE)
	# some of these libraries are problematic on Linux
	# disable less important dependencies by default
	set(_init_CODEC_FFMPEG                   OFF)
	set(_init_CYCLES_OSL                     OFF)
	set(_init_IMAGE_OPENEXR                  OFF)
	set(_init_JACK                           OFF)
	set(_init_OPENCOLLADA                    OFF)
	set(_init_OPENCOLORIO                    OFF)
	set(_init_SDL                            OFF)
	set(_init_FFTW3                          OFF)
	set(_init_OPENSUBDIV                     OFF)
elseif(WIN32)
	set(_init_JACK                           OFF)
elseif(APPLE)
	set(_init_JACK                           OFF)
endif()


#-----------------------------------------------------------------------------
# Options

# First platform specific non-cached vars
if(UNIX AND NOT (APPLE OR HAIKU))
	set(WITH_X11 ON)
endif()

# Blender internal features
option(WITH_BLENDER "Build blender (disable to build only the blender player)" ON)
mark_as_advanced(WITH_BLENDER)

option(WITH_INTERNATIONAL "Enable I18N (International fonts and text)" ON)

option(WITH_PYTHON        "Enable Embedded Python API  (only disable for development)" ON)
option(WITH_PYTHON_SECURITY "Disables execution of scripts within blend files by default" ON)
mark_as_advanced(WITH_PYTHON)  # don't want people disabling this unless they really know what they are doing.
mark_as_advanced(WITH_PYTHON_SECURITY)  # some distributions see this as a security issue, rather than have them patch it, make a build option.

option(WITH_PYTHON_SAFETY "Enable internal API error checking to track invalid data to prevent crash on access (at the expense of some efficiency, only enable for development)." OFF)
mark_as_advanced(WITH_PYTHON_SAFETY)
option(WITH_PYTHON_MODULE "Enable building as a python module which runs without a user interface, like running regular blender in background mode (experimental, only enable for development), installs to PYTHON_SITE_PACKAGES (or CMAKE_INSTALL_PREFIX if WITH_INSTALL_PORTABLE is enabled)." OFF)
if(APPLE)
	option(WITH_PYTHON_FRAMEWORK "Enable building using the Python available in the framework (OSX only)" OFF)
endif()

option(WITH_BUILDINFO     "Include extra build details (only disable for development & faster builds)" ${_init_BUILDINFO})
if(${CMAKE_VERSION} VERSION_LESS 2.8.8)
	# add_library OBJECT arg unsupported
	set(WITH_BUILDINFO OFF)
endif()
set(BUILDINFO_OVERRIDE_DATE "" CACHE STRING "Use instead of the current date for reproducible builds (empty string disables this option)")
set(BUILDINFO_OVERRIDE_TIME "" CACHE STRING "Use instead of the current time for reproducible builds (empty string disables this option)")
set(CPACK_OVERRIDE_PACKAGENAME "" CACHE STRING "Use instead of the standard packagename (empty string disables this option)")
mark_as_advanced(CPACK_OVERRIDE_PACKAGENAME)
mark_as_advanced(BUILDINFO_OVERRIDE_DATE)
mark_as_advanced(BUILDINFO_OVERRIDE_TIME)

option(WITH_IK_ITASC      "Enable ITASC IK solver (only disable for development & for incompatible C++ compilers)" ON)
option(WITH_IK_SOLVER     "Enable Legacy IK solver (only disable for development)" ON)
option(WITH_FFTW3         "Enable FFTW3 support (Used for smoke, ocean sim, and audio effects)" ${_init_FFTW3})
option(WITH_BULLET        "Enable Bullet (Physics Engine)" ON)
option(WITH_SYSTEM_BULLET "Use the systems bullet library (currently unsupported due to missing features in upstream!)" )
mark_as_advanced(WITH_SYSTEM_BULLET)
option(WITH_OPENCOLORIO   "Enable OpenColorIO color management" ${_init_OPENCOLORIO})

# Compositor
option(WITH_COMPOSITOR         "Enable the tile based nodal compositor" ON)

option(WITH_OPENSUBDIV    "Enable OpenSubdiv for surface subdivision" ${_init_OPENSUBDIV})

option(WITH_OPENVDB       "Enable features relying on OpenVDB" OFF)
option(WITH_OPENVDB_BLOSC "Enable blosc compression for OpenVDB, only enable if OpenVDB was built with blosc support" OFF)
option(WITH_OPENVDB_3_ABI_COMPATIBLE "Assume OpenVDB library has been compiled with version 3 ABI compatibility" OFF)
mark_as_advanced(WITH_OPENVDB_3_ABI_COMPATIBLE)

# GHOST Windowing Library Options
option(WITH_GHOST_DEBUG   "Enable debugging output for the GHOST library" OFF)
mark_as_advanced(WITH_GHOST_DEBUG)

option(WITH_GHOST_SDL    "Enable building Blender against SDL for windowing rather than the native APIs" OFF)
mark_as_advanced(WITH_GHOST_SDL)

if(WITH_X11)
	option(WITH_GHOST_XDND    "Enable drag'n'drop support on X11 using XDND protocol" ON)
endif()

# Misc...
option(WITH_HEADLESS      "Build without graphical support (renderfarm, server mode only)" OFF)
mark_as_advanced(WITH_HEADLESS)

option(WITH_AUDASPACE    "Build with blenders audio library (only disable if you know what you're doing!)" ON)
option(WITH_SYSTEM_AUDASPACE "Build with external audaspace library installed on the system (only enable if you know what you're doing!)" OFF)
mark_as_advanced(WITH_AUDASPACE)
mark_as_advanced(WITH_SYSTEM_AUDASPACE)

if(NOT WITH_AUDASPACE)
	set(WITH_SYSTEM_AUDASPACE OFF)
endif()

option(WITH_OPENMP        "Enable OpenMP (has to be supported by the compiler)" ON)
if(UNIX AND NOT APPLE)
	option(WITH_OPENMP_STATIC "Link OpenMP statically (only used by the release environment)" OFF)
	mark_as_advanced(WITH_OPENMP_STATIC)
endif()

if(WITH_X11)
	option(WITH_X11_XINPUT    "Enable X11 Xinput (tablet support and unicode input)"  ON)
	option(WITH_X11_XF86VMODE "Enable X11 video mode switching"                       ON)
	option(WITH_X11_XFIXES    "Enable X11 XWayland cursor warping workaround"         ON)
	option(WITH_X11_ALPHA     "Enable X11 transparent background"                     ON)
endif()

if(UNIX AND NOT APPLE)
	option(WITH_SYSTEM_GLEW "Use GLEW OpenGL wrapper library provided by the operating system" OFF)
	option(WITH_SYSTEM_GLES "Use OpenGL ES library provided by the operating system"           ON)
else()
	# not an option for other OS's
	set(WITH_SYSTEM_GLEW OFF)
	set(WITH_SYSTEM_GLES OFF)
endif()


if(UNIX AND NOT APPLE)
	option(WITH_SYSTEM_EIGEN3 "Use the systems Eigen3 library" OFF)
endif()


# Modifiers
option(WITH_MOD_FLUID           "Enable Elbeem Modifier (Fluid Simulation)" ON)
option(WITH_MOD_SMOKE           "Enable Smoke Modifier (Smoke Simulation)" ON)
option(WITH_MOD_REMESH          "Enable Remesh Modifier" ON)
# option(WITH_MOD_CLOTH_ELTOPO    "Enable Experimental cloth solver" OFF)  # this is now only available in a branch
# mark_as_advanced(WITH_MOD_CLOTH_ELTOPO)
option(WITH_MOD_OCEANSIM        "Enable Ocean Modifier" OFF)

# Image format support
option(WITH_OPENIMAGEIO         "Enable OpenImageIO Support (http://www.openimageio.org)" ON)
option(WITH_IMAGE_OPENEXR       "Enable OpenEXR Support (http://www.openexr.com)" ${_init_IMAGE_OPENEXR})
option(WITH_IMAGE_OPENJPEG      "Enable OpenJpeg Support (http://www.openjpeg.org)" ON)
option(WITH_IMAGE_TIFF          "Enable LibTIFF Support" ON)
option(WITH_IMAGE_DDS           "Enable DDS Image Support" ON)
option(WITH_IMAGE_CINEON        "Enable CINEON and DPX Image Support" ON)
option(WITH_IMAGE_HDR           "Enable HDR Image Support" ON)

# Audio/Video format support
option(WITH_CODEC_AVI           "Enable Blenders own AVI file support (raw/jpeg)" ON)
option(WITH_CODEC_FFMPEG        "Enable FFMPeg Support (http://ffmpeg.org)" ${_init_CODEC_FFMPEG})
option(WITH_CODEC_SNDFILE       "Enable libsndfile Support (http://www.mega-nerd.com/libsndfile)" OFF)

# Alembic support
option(WITH_ALEMBIC             "Enable Alembic Support" OFF)
option(WITH_ALEMBIC_HDF5        "Enable Legacy Alembic Support (not officially supported)" OFF)

# 3D format support
# Disable opencollada when we don't have precompiled libs
option(WITH_OPENCOLLADA   "Enable OpenCollada Support (http://www.opencollada.org)" ${_init_OPENCOLLADA})

# Sound output
option(WITH_SDL           "Enable SDL for sound and joystick support" ${_init_SDL})
option(WITH_OPENAL        "Enable OpenAL Support (http://www.openal.org)" ON)
option(WITH_JACK          "Enable JACK Support (http://www.jackaudio.org)" ${_init_JACK})
if(UNIX AND NOT APPLE)
	option(WITH_JACK_DYNLOAD  "Enable runtime dynamic JACK libraries loading" OFF)
endif()
if(UNIX AND NOT APPLE)
	option(WITH_SDL_DYNLOAD  "Enable runtime dynamic SDL libraries loading" OFF)
endif()

# Compression
option(WITH_LZO           "Enable fast LZO compression (used for pointcache)" ON)
option(WITH_LZMA          "Enable best LZMA compression, (used for pointcache)" ON)
if(UNIX AND NOT APPLE)
	option(WITH_SYSTEM_LZO    "Use the system LZO library" OFF)
endif()

# Camera/motion tracking
option(WITH_LIBMV         "Enable Libmv structure from motion library" ON)
option(WITH_LIBMV_SCHUR_SPECIALIZATIONS "Enable fixed-size schur specializations." OFF)
mark_as_advanced(WITH_LIBMV_SCHUR_SPECIALIZATIONS)

# Logging/unbit test libraries.
option(WITH_SYSTEM_GFLAGS   "Use system-wide Gflags instead of a bundled one" OFF)
option(WITH_SYSTEM_GLOG     "Use system-wide Glog instead of a bundled one" OFF)
mark_as_advanced(WITH_SYSTEM_GFLAGS)
mark_as_advanced(WITH_SYSTEM_GLOG)

# Freestyle
option(WITH_FREESTYLE     "Enable Freestyle (advanced edges rendering)" ON)

# Misc
if(WIN32)
	option(WITH_INPUT_IME "Enable Input Method Editor (IME) for complex Asian character input" ON)
endif()
option(WITH_INPUT_NDOF "Enable NDOF input devices (SpaceNavigator and friends)" ${_init_INPUT_NDOF})
option(WITH_RAYOPTIMIZATION	"Enable use of SIMD (SSE) optimizations for the raytracer" ON)
if(UNIX AND NOT APPLE)
	option(WITH_INSTALL_PORTABLE "Install redistributeable runtime, otherwise install into CMAKE_INSTALL_PREFIX" ON)
	option(WITH_STATIC_LIBS "Try to link with static libraries, as much as possible, to make blender more portable across distributions" OFF)
	if(WITH_STATIC_LIBS)
		option(WITH_BOOST_ICU "Boost uses ICU library (required for linking with static Boost built with libicu)." OFF)
		mark_as_advanced(WITH_BOOST_ICU)
	endif()
endif()

option(WITH_PYTHON_INSTALL       "Copy system python into the blender install folder" ON)
if(WIN32 OR APPLE)
	# Windows and macOS have this bundled with Python libraries.
elseif(WITH_PYTHON_INSTALL OR (WITH_AUDASPACE AND NOT WITH_SYSTEM_AUDASPACE))
	set(PYTHON_NUMPY_PATH            "" CACHE PATH "Path to python site-packages or dist-packages containing 'numpy' module")
	mark_as_advanced(PYTHON_NUMPY_PATH)
	set(PYTHON_NUMPY_INCLUDE_DIRS ${PYTHON_NUMPY_PATH}/numpy/core/include CACHE PATH "Path to the include directory of the numpy module")
	mark_as_advanced(PYTHON_NUMPY_INCLUDE_DIRS)
endif()
if(WITH_PYTHON_INSTALL)
	option(WITH_PYTHON_INSTALL_NUMPY "Copy system numpy into the blender install folder"  ON)

	if(UNIX AND NOT APPLE)
		option(WITH_PYTHON_INSTALL_REQUESTS "Copy system requests into the blender install folder" ON)
		set(PYTHON_REQUESTS_PATH "" CACHE PATH "Path to python site-packages or dist-packages containing 'requests' module")
		mark_as_advanced(PYTHON_REQUESTS_PATH)
	endif()
endif()

option(WITH_CPU_SSE              "Enable SIMD instruction if they're detected on the host machine" ON)
mark_as_advanced(WITH_CPU_SSE)

# Cycles
option(WITH_CYCLES					"Enable Cycles Render Engine" ON)
option(WITH_CYCLES_STANDALONE		"Build Cycles standalone application" OFF)
option(WITH_CYCLES_STANDALONE_GUI	"Build Cycles standalone with GUI" OFF)
option(WITH_CYCLES_OSL				"Build Cycles with OSL support" ${_init_CYCLES_OSL})
option(WITH_CYCLES_EMBREE			"Build Cycles with Embree support" OFF)
option(WITH_CYCLES_CUDA_BINARIES	"Build Cycles CUDA binaries" OFF)
option(WITH_CYCLES_CUBIN_COMPILER	"Build cubins with nvrtc based compiler instead of nvcc" OFF)
option(WITH_CYCLES_CUDA_BUILD_SERIAL "Build cubins one after another (useful on machines with limited RAM)" OFF)
mark_as_advanced(WITH_CYCLES_CUDA_BUILD_SERIAL)
set(CYCLES_CUDA_BINARIES_ARCH sm_30 sm_35 sm_37 sm_50 sm_52 sm_60 sm_61 sm_70 sm_72 sm_75 CACHE STRING "CUDA architectures to build binaries for")
mark_as_advanced(CYCLES_CUDA_BINARIES_ARCH)
unset(PLATFORM_DEFAULT)
option(WITH_CYCLES_LOGGING	"Build Cycles with logging support" ON)
option(WITH_CYCLES_DEBUG	"Build Cycles with extra debug capabilities" OFF)
option(WITH_CYCLES_NATIVE_ONLY	"Build Cycles with native kernel only (which fits current CPU, use for development only)" OFF)
mark_as_advanced(WITH_CYCLES_CUBIN_COMPILER)
mark_as_advanced(WITH_CYCLES_LOGGING)
mark_as_advanced(WITH_CYCLES_DEBUG)
mark_as_advanced(WITH_CYCLES_NATIVE_ONLY)

option(WITH_CYCLES_DEVICE_CUDA				"Enable Cycles CUDA compute support" ON)
option(WITH_CYCLES_DEVICE_OPENCL			"Enable Cycles OpenCL compute support" ON)
option(WITH_CYCLES_NETWORK				"Enable Cycles compute over network support (EXPERIMENTAL and unfinished)" OFF)
mark_as_advanced(WITH_CYCLES_DEVICE_CUDA)
mark_as_advanced(WITH_CYCLES_DEVICE_OPENCL)
mark_as_advanced(WITH_CYCLES_NETWORK)

option(WITH_CUDA_DYNLOAD "Dynamically load CUDA libraries at runtime" ON)
mark_as_advanced(WITH_CUDA_DYNLOAD)

# LLVM
option(WITH_LLVM					"Use LLVM" OFF)
if(APPLE)
	option(LLVM_STATIC					"Link with LLVM static libraries" ON) # we prefer static llvm build on Apple, dyn build possible though
else()
	option(LLVM_STATIC					"Link with LLVM static libraries" OFF)
endif()
mark_as_advanced(LLVM_STATIC)

# disable for now, but plan to support on all platforms eventually
option(WITH_MEM_JEMALLOC   "Enable malloc replacement (http://www.canonware.com/jemalloc)" ON)
mark_as_advanced(WITH_MEM_JEMALLOC)

# currently only used for BLI_mempool
option(WITH_MEM_VALGRIND "Enable extended valgrind support for better reporting" OFF)
mark_as_advanced(WITH_MEM_VALGRIND)

# Debug
option(WITH_CXX_GUARDEDALLOC "Enable GuardedAlloc for C++ memory allocation tracking (only enable for development)" OFF)
mark_as_advanced(WITH_CXX_GUARDEDALLOC)

option(WITH_ASSERT_ABORT "Call abort() when raising an assertion through BLI_assert()" ON)
mark_as_advanced(WITH_ASSERT_ABORT)

option(WITH_BOOST					"Enable features depending on boost" ON)

# Unit testsing
option(WITH_GTESTS "Enable GTest unit testing" OFF)
option(WITH_OPENGL_RENDER_TESTS "Enable OpenGL render related unit testing (Experimental)" OFF)
option(WITH_OPENGL_DRAW_TESTS "Enable OpenGL UI drawing related unit testing (Experimental)" OFF)


# Documentation
if(UNIX AND NOT APPLE)
	option(WITH_DOC_MANPAGE "Create a manual page (Unix manpage)" OFF)
endif()


# OpenGL

option(WITH_OPENGL              "When off limits visibility of the opengl headers to just bf_gpu and gawain (temporary option for development purposes)" ON)
option(WITH_GLEW_ES             "Switches to experimental copy of GLEW that has support for OpenGL ES. (temporary option for development purposes)" OFF)
option(WITH_GL_EGL              "Use the EGL OpenGL system library instead of the platform specific OpenGL system library (CGL, glX, or WGL)"       OFF)
option(WITH_GL_PROFILE_ES20     "Support using OpenGL ES 2.0. (thru either EGL or the AGL/WGL/XGL 'es20' profile)"                                  OFF)

mark_as_advanced(
	WITH_OPENGL
	WITH_GLEW_ES
	WITH_GL_EGL
	WITH_GL_PROFILE_ES20
)

if(WIN32)
	option(WITH_GL_ANGLE "Link with the ANGLE library, an OpenGL ES 2.0 implementation based on Direct3D, instead of the system OpenGL library." OFF)
	mark_as_advanced(WITH_GL_ANGLE)
endif()

if(WITH_GLEW_ES AND WITH_SYSTEM_GLEW)
	message(WARNING Ignoring WITH_SYSTEM_GLEW and using WITH_GLEW_ES)
	set(WITH_SYSTEM_GLEW OFF)
endif()

if(WIN32)
	getDefaultWindowsPrefixBase(CMAKE_GENERIC_PROGRAM_FILES)
	set(CPACK_INSTALL_PREFIX ${CMAKE_GENERIC_PROGRAM_FILES}/${})
endif()

# Compiler toolchain
if(CMAKE_COMPILER_IS_GNUCC)
	option(WITH_LINKER_GOLD "Use ld.gold linker which is usually faster than ld.bfd" ON)
	mark_as_advanced(WITH_LINKER_GOLD)
endif()

if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang")
	option(WITH_COMPILER_ASAN "Build and link against address sanitizer (only for Debug & RelWithDebInfo targets)." OFF)
	mark_as_advanced(WITH_COMPILER_ASAN)

	if(WITH_COMPILER_ASAN)
		set(_asan_defaults "\
-fsanitize=address \
-fsanitize=bool \
-fsanitize=bounds \
-fsanitize=enum \
-fsanitize=float-cast-overflow \
-fsanitize=float-divide-by-zero \
-fsanitize=nonnull-attribute \
-fsanitize=returns-nonnull-attribute \
-fsanitize=signed-integer-overflow \
-fsanitize=undefined \
-fsanitize=vla-bound \
-fno-sanitize=alignment \
")

		if(NOT MSVC) # not all sanitizers are supported with clang-cl, these two however are very vocal about it
			set(_asan_defaults "${_asan_defaults} -fsanitize=leak -fsanitize=object-size" )
		endif()
		set(COMPILER_ASAN_CFLAGS "${_asan_defaults}" CACHE STRING "C flags for address sanitizer")
		mark_as_advanced(COMPILER_ASAN_CFLAGS)
		set(COMPILER_ASAN_CXXFLAGS "${_asan_defaults}" CACHE STRING "C++ flags for address sanitizer")
		mark_as_advanced(COMPILER_ASAN_CXXFLAGS)

		unset(_asan_defaults)

		if(NOT MSVC)
			find_library(COMPILER_ASAN_LIBRARY asan ${CMAKE_C_IMPLICIT_LINK_DIRECTORIES})
		else()
			find_library( COMPILER_ASAN_LIBRARY NAMES clang_rt.asan-x86_64
				PATHS
				[HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\LLVM\\LLVM;]/lib/clang/7.0.0/lib/windows
				[HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\LLVM\\LLVM;]/lib/clang/6.0.0/lib/windows
			)
		endif()
		mark_as_advanced(COMPILER_ASAN_LIBRARY)
	endif()
endif()

# Dependency graph
option(WITH_LEGACY_DEPSGRAPH "Build Blender with legacy dependency graph" ON)
mark_as_advanced(WITH_LEGACY_DEPSGRAPH)

if(WIN32)
	# Use hardcoded paths or find_package to find externals
	option(WITH_WINDOWS_FIND_MODULES "Use find_package to locate libraries" OFF)
	mark_as_advanced(WITH_WINDOWS_FIND_MODULES)

	option(WITH_WINDOWS_CODESIGN "Use signtool to sign the final binary." OFF)
	mark_as_advanced(WITH_WINDOWS_CODESIGN)

	set(WINDOWS_CODESIGN_PFX CACHE FILEPATH  "Path to pfx file to use for codesigning.")
	mark_as_advanced(WINDOWS_CODESIGN_PFX)

	set(WINDOWS_CODESIGN_PFX_PASSWORD CACHE STRING  "password for pfx file used for codesigning.")
	mark_as_advanced(WINDOWS_CODESIGN_PFX_PASSWORD)

	option(WINDOWS_USE_VISUAL_STUDIO_FOLDERS "Organize the visual studio project according to source folders." ON)
	mark_as_advanced(WINDOWS_USE_VISUAL_STUDIO_FOLDERS)

	option(WINDOWS_PYTHON_DEBUG "Include the files needed for debugging python scripts with visual studio 2017+." OFF)
	mark_as_advanced(WINDOWS_PYTHON_DEBUG)
endif()

# avoid using again
option_defaults_clear()

# end option(...)



# By default we want to install to the directory we are compiling our executables
# unless specified otherwise, which we currently do not allow
if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
	if(WIN32)
		set(CMAKE_INSTALL_PREFIX ${EXECUTABLE_OUTPUT_PATH}/\${BUILD_TYPE} CACHE PATH "default install path" FORCE)
	elseif(APPLE)
		set(CMAKE_INSTALL_PREFIX ${EXECUTABLE_OUTPUT_PATH}/\${BUILD_TYPE} CACHE PATH "default install path" FORCE)
	else()
		if(WITH_INSTALL_PORTABLE)
			set(CMAKE_INSTALL_PREFIX ${EXECUTABLE_OUTPUT_PATH} CACHE PATH "default install path" FORCE)
		endif()
	endif()
endif()



# Apple

if(APPLE)
	include(platform_apple_xcode)
endif()


#-----------------------------------------------------------------------------
# Check for conflicting/unsupported configurations

if(NOT WITH_BLENDER AND NOT WITH_CYCLES_STANDALONE)
	message(FATAL_ERROR
		"At least one of WITH_BLENDER or WITH_CYCLES_STANDALONE "
		"must be enabled, nothing to do!"
	)
endif()

if(NOT WITH_AUDASPACE)
	if(WITH_OPENAL)
		message(WARNING "WITH_OPENAL requires WITH_AUDASPACE which is disabled")
		set(WITH_OPENAL OFF)
	endif()
	if(WITH_JACK)
		message(WARNING "WITH_JACK requires WITH_AUDASPACE which is disabled")
		set(WITH_JACK OFF)
	endif()
endif()

if(NOT WITH_SDL AND WITH_GHOST_SDL)
	message(FATAL_ERROR "WITH_GHOST_SDL requires WITH_SDL")
endif()

# python module, needs some different options
if(WITH_PYTHON_MODULE AND WITH_PYTHON_INSTALL)
	message(FATAL_ERROR "WITH_PYTHON_MODULE requires WITH_PYTHON_INSTALL to be OFF")
endif()


# may as well build python module without a UI
if(WITH_PYTHON_MODULE)
	set(WITH_HEADLESS ON)
endif()

if(NOT WITH_PYTHON)
	set(WITH_CYCLES OFF)
endif()

# enable boost for cycles, audaspace or i18n
# otherwise if the user disabled
if(NOT WITH_BOOST)
	# Explicitly disabled. so disable all deps.
	macro(set_and_warn
		_setting _val)
		if(${${_setting}})
			message(STATUS "'WITH_BOOST' is disabled: forcing 'set(${_setting} ${_val})'")
		endif()
		set(${_setting} ${_val})
	endmacro()

	set_and_warn(WITH_CYCLES         OFF)
	set_and_warn(WITH_INTERNATIONAL  OFF)
	set_and_warn(WITH_OPENVDB        OFF)
	set_and_warn(WITH_OPENCOLORIO    OFF)
elseif(WITH_CYCLES OR WITH_OPENIMAGEIO OR WITH_INTERNATIONAL OR
       WITH_OPENVDB OR WITH_OPENCOLORIO)
	# Keep enabled
else()
	# Disable boost if not needed.
	set(WITH_BOOST OFF)
endif()

# auto enable openimageio for cycles
if(WITH_CYCLES)
	set(WITH_OPENIMAGEIO ON)

	# auto enable llvm for cycles_osl
	if(WITH_CYCLES_OSL)
		set(WITH_LLVM ON CACHE BOOL "" FORCE)
	endif()
else()
	set(WITH_CYCLES_OSL OFF)
endif()

# auto enable openimageio linking dependencies
if(WITH_OPENIMAGEIO)
	set(WITH_IMAGE_OPENEXR ON)
	set(WITH_IMAGE_TIFF ON)
endif()

# auto enable alembic linking dependencies
if(WITH_ALEMBIC)
	set(WITH_IMAGE_OPENEXR ON)
endif()

# don't store paths to libs for portable distribution
if(WITH_INSTALL_PORTABLE)
	set(CMAKE_SKIP_BUILD_RPATH TRUE)
endif()

if(WITH_GHOST_SDL OR WITH_HEADLESS)
	set(WITH_X11           OFF)
	set(WITH_X11_XINPUT    OFF)
	set(WITH_X11_XF86VMODE OFF)
	set(WITH_X11_XFIXES    OFF)
	set(WITH_X11_ALPHA     OFF)
	set(WITH_GHOST_XDND    OFF)
	set(WITH_INPUT_IME     OFF)
endif()

if(WITH_CPU_SSE)
	TEST_SSE_SUPPORT(COMPILER_SSE_FLAG COMPILER_SSE2_FLAG)
else()
	message(STATUS "SSE and SSE2 optimizations are DISABLED!")
	set(COMPILER_SSE_FLAG)
	set(COMPILER_SSE2_FLAG)
endif()

if(WITH_BUILDINFO)
	find_package(Git)
	if(NOT GIT_FOUND)
		message(WARNING "Git was not found, disabling WITH_BUILDINFO")
		set(WITH_BUILDINFO OFF)
	endif()
endif()

if(WITH_AUDASPACE)
	if(NOT WITH_SYSTEM_AUDASPACE)
		set(AUDASPACE_C_INCLUDE_DIRS "${CMAKE_SOURCE_DIR}/extern/audaspace/bindings/C" "${CMAKE_BINARY_DIR}/extern/audaspace")
		set(AUDASPACE_PY_INCLUDE_DIRS "${CMAKE_SOURCE_DIR}/extern/audaspace/bindings")
	endif()
endif()

# Auto-enable CUDA dynload if toolkit is not found.
if(NOT WITH_CUDA_DYNLOAD)
	find_package(CUDA)
	if (NOT CUDA_FOUND)
		message("CUDA toolkit not found, using dynamic runtime loading of libraries instead")
		set(WITH_CUDA_DYNLOAD ON)
	endif()
endif()

#-----------------------------------------------------------------------------
# Check for valid directories
# ... a partial checkout may cause this.
#
# note: we need to check for a known subdir in both cases.
#       since uninitialized git submodules will give blank dirs

if(WITH_INTERNATIONAL)
	if(NOT EXISTS "${CMAKE_SOURCE_DIR}/release/datafiles/locale/languages")
		message(WARNING
			"Translation path '${CMAKE_SOURCE_DIR}/release/datafiles/locale' is missing, "
			"This is a 'git submodule', which are known not to work with bridges to other version "
			"control systems, disabling 'WITH_INTERNATIONAL'."
		)
		set(WITH_INTERNATIONAL OFF)
	endif()
endif()

if(WITH_PYTHON)
	# While we have this as an '#error' in 'bpy_capi_utils.h',
	# upgrading Python tends to cause confusion for users who build.
	# Give the error message early to make this more obvious.
	#
	# Do this before main 'platform_*' checks,
	# because UNIX will search for the old Python paths which may not exist.
	# giving errors about missing paths before this case is met.
	if(DEFINED PYTHON_VERSION AND "${PYTHON_VERSION}" VERSION_LESS "3.6")
		message(FATAL_ERROR "At least Python 3.6 is required to build")
	endif()

	if(NOT EXISTS "${CMAKE_SOURCE_DIR}/release/scripts/addons/modules")
		message(WARNING
			"Addons path '${CMAKE_SOURCE_DIR}/release/scripts/addons' is missing, "
			"This is a 'git submodule', which are known not to work with bridges to other version "
			"control systems: * CONTINUING WITHOUT ADDONS *"
		)
	endif()
endif()

#-----------------------------------------------------------------------------
# Initialize un-cached vars, avoid unused warning

# linux only, not cached
set(WITH_BINRELOC OFF)

# MACOSX only, set to avoid uninitialized
set(EXETYPE "")

# C/C++ flags
set(PLATFORM_CFLAGS)

# these are added to later on.
set(C_WARNINGS)
set(CXX_WARNINGS)

# for gcc -Wno-blah-blah
set(C_REMOVE_STRICT_FLAGS)
set(CXX_REMOVE_STRICT_FLAGS)

# libraries to link the binary with passed to target_link_libraries()
# known as LLIBS to scons
set(PLATFORM_LINKLIBS "")

# Added to linker flags in setup_liblinks
# - CMAKE_EXE_LINKER_FLAGS
# - CMAKE_EXE_LINKER_FLAGS_DEBUG
set(PLATFORM_LINKFLAGS "")
set(PLATFORM_LINKFLAGS_DEBUG "")

if (NOT CMAKE_BUILD_TYPE MATCHES "Release")
	if(WITH_COMPILER_ASAN)
		set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${COMPILER_ASAN_CFLAGS}")
		set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} ${COMPILER_ASAN_CFLAGS}")

		set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COMPILER_ASAN_CXXFLAGS}")
		set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${COMPILER_ASAN_CXXFLAGS}")
		if(MSVC)
			set(COMPILER_ASAN_LINKER_FLAGS "/FUNCTIONPADMIN:6")
		endif()
		set(PLATFORM_LINKLIBS "${PLATFORM_LINKLIBS};${COMPILER_ASAN_LIBRARY}")
		set(PLATFORM_LINKFLAGS "${COMPILER_ASAN_LIBRARY} ${COMPILER_ASAN_LINKER_FLAGS}")
		set(PLATFORM_LINKFLAGS_DEBUG "${COMPILER_ASAN_LIBRARY} ${COMPILER_ASAN_LINKER_FLAGS}")
	endif()
endif()

#-----------------------------------------------------------------------------
#Platform specifics

if(WITH_X11)
	find_package(X11 REQUIRED)

	find_path(X11_XF86keysym_INCLUDE_PATH X11/XF86keysym.h ${X11_INC_SEARCH_PATH})
	mark_as_advanced(X11_XF86keysym_INCLUDE_PATH)

	list(APPEND PLATFORM_LINKLIBS ${X11_X11_LIB})

	if(WITH_X11_XINPUT)
		if(X11_Xinput_LIB)
			list(APPEND PLATFORM_LINKLIBS ${X11_Xinput_LIB})
		else()
			set(WITH_X11_XINPUT OFF)
		endif()
	endif()

	if(WITH_X11_XF86VMODE)
		# XXX, why doesn't cmake make this available?
		find_library(X11_Xxf86vmode_LIB Xxf86vm   ${X11_LIB_SEARCH_PATH})
		mark_as_advanced(X11_Xxf86vmode_LIB)
		if(X11_Xxf86vmode_LIB)
			list(APPEND PLATFORM_LINKLIBS ${X11_Xxf86vmode_LIB})
		else()
			set(WITH_X11_XF86VMODE OFF)
		endif()
	endif()

	if(WITH_X11_XFIXES)
		if(X11_Xfixes_LIB)
			list(APPEND PLATFORM_LINKLIBS ${X11_Xfixes_LIB})
		else()
			set(WITH_X11_XFIXES OFF)
		endif()
	endif()

	if(WITH_X11_ALPHA)
		find_library(X11_Xrender_LIB Xrender  ${X11_LIB_SEARCH_PATH})
		mark_as_advanced(X11_Xrender_LIB)
		if(X11_Xrender_LIB)
			list(APPEND PLATFORM_LINKLIBS ${X11_Xrender_LIB})
		else()
			set(WITH_X11_ALPHA OFF)
		endif()
	endif()

endif()


# ----------------------------------------------------------------------------
# Main Platform Checks
#
# - UNIX
# - WIN32
# - APPLE

if(UNIX AND NOT APPLE)
	include(platform_unix)
elseif(WIN32)
	include(platform_win32)
elseif(APPLE)
	include(platform_apple)
endif()

#-----------------------------------------------------------------------------
# Common.

if(NOT WITH_FFTW3 AND WITH_MOD_OCEANSIM)
	message(FATAL_ERROR "WITH_MOD_OCEANSIM requires WITH_FFTW3 to be ON")
endif()

if(WITH_CYCLES)
	if(NOT WITH_OPENIMAGEIO)
		message(FATAL_ERROR
			"Cycles requires WITH_OPENIMAGEIO, the library may not have been found. "
			"Configure OIIO or disable WITH_CYCLES"
		)
	endif()
	if(NOT WITH_BOOST)
		message(FATAL_ERROR
			"Cycles requires WITH_BOOST, the library may not have been found. "
			"Configure BOOST or disable WITH_CYCLES"
		)
	endif()

	if(WITH_CYCLES_OSL)
		if(NOT WITH_LLVM)
			message(FATAL_ERROR
				"Cycles OSL requires WITH_LLVM, the library may not have been found. "
				"Configure LLVM or disable WITH_CYCLES_OSL"
			)
		endif()
	endif()
endif()

if(WITH_INTERNATIONAL)
	if(NOT WITH_BOOST)
		message(FATAL_ERROR
			"Internationalization requires WITH_BOOST, the library may not have been found. "
			"Configure BOOST or disable WITH_INTERNATIONAL"
		)
	endif()
endif()

# See TEST_SSE_SUPPORT() for how this is defined.

# Do it globally, SSE2 is required for quite some time now.
# Doing it now allows to use SSE/SSE2 in inline headers.
if(SUPPORT_SSE_BUILD)
	set(PLATFORM_CFLAGS " ${COMPILER_SSE_FLAG} ${PLATFORM_CFLAGS}")
	add_definitions(-D__SSE__ -D__MMX__)
endif()
if(SUPPORT_SSE2_BUILD)
	set(PLATFORM_CFLAGS " ${PLATFORM_CFLAGS} ${COMPILER_SSE2_FLAG}")
	add_definitions(-D__SSE2__)
	if(NOT SUPPORT_SSE_BUILD) # don't double up
		add_definitions(-D__MMX__)
	endif()
endif()


# set the endian define
if(MSVC)
	# for some reason this fails on msvc
	add_definitions(-D__LITTLE_ENDIAN__)

# OSX-Note: as we do cross-compiling with specific set architecture,
# endianess-detection and auto-setting is counterproductive
# so we just set endianness according CMAKE_OSX_ARCHITECTURES

elseif(CMAKE_OSX_ARCHITECTURES MATCHES i386 OR CMAKE_OSX_ARCHITECTURES MATCHES x86_64)
	add_definitions(-D__LITTLE_ENDIAN__)
elseif(CMAKE_OSX_ARCHITECTURES MATCHES ppc OR CMAKE_OSX_ARCHITECTURES MATCHES ppc64)
	add_definitions(-D__BIG_ENDIAN__)

else()
	include(TestBigEndian)
	test_big_endian(_SYSTEM_BIG_ENDIAN)
	if(_SYSTEM_BIG_ENDIAN)
		add_definitions(-D__BIG_ENDIAN__)
	else()
		add_definitions(-D__LITTLE_ENDIAN__)
	endif()
	unset(_SYSTEM_BIG_ENDIAN)
endif()
if(WITH_IMAGE_OPENJPEG)
	# Special handling of Windows platform where openjpeg is always static.
	if(WIN32)
		set(OPENJPEG_DEFINES "-DOPJ_STATIC")
	else()
		set(OPENJPEG_DEFINES "")
	endif()
endif()

if(NOT WITH_SYSTEM_EIGEN3)
	set(EIGEN3_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/extern/Eigen3)
endif()

#-----------------------------------------------------------------------------
# Configure OpenGL.

find_package(OpenGL)
blender_include_dirs_sys("${OPENGL_INCLUDE_DIR}")

if(WITH_OPENGL)
	add_definitions(-DWITH_OPENGL)
endif()

if(WITH_SYSTEM_GLES)
	find_package_wrapper(OpenGLES)
endif()

if(WITH_GL_PROFILE_ES20)
	if(WITH_SYSTEM_GLES)
		if(NOT OPENGLES_LIBRARY)
			message(FATAL_ERROR
				"Unable to find OpenGL ES libraries. "
				"Install them or disable WITH_SYSTEM_GLES."
			)
		endif()

		list(APPEND BLENDER_GL_LIBRARIES OPENGLES_LIBRARY)

	else()
		set(OPENGLES_LIBRARY "" CACHE FILEPATH "OpenGL ES 2.0 library file")
		mark_as_advanced(OPENGLES_LIBRARY)

		list(APPEND BLENDER_GL_LIBRARIES "${OPENGLES_LIBRARY}")

		if(NOT OPENGLES_LIBRARY)
			message(FATAL_ERROR
				"To compile WITH_GL_EGL you need to set OPENGLES_LIBRARY "
				"to the file path of an OpenGL ES 2.0 library."
			)
		endif()

	endif()

	if(WIN32)
		# Setup paths to files needed to install and redistribute Windows Blender with OpenGL ES

		set(OPENGLES_DLL "" CACHE FILEPATH "OpenGL ES 2.0 redistributable DLL file")
		mark_as_advanced(OPENGLES_DLL)

		if(NOT OPENGLES_DLL)
			message(FATAL_ERROR
				"To compile WITH_GL_PROFILE_ES20 you need to set OPENGLES_DLL to the file "
				"path of an OpenGL ES 2.0 runtime dynamic link library (DLL)."
			)
		endif()

		if(WITH_GL_ANGLE)
			list(APPEND GL_DEFINITIONS -DWITH_ANGLE)

			set(D3DCOMPILER_DLL "" CACHE FILEPATH "Direct3D Compiler redistributable DLL file (needed by ANGLE)")

			get_filename_component(D3DCOMPILER_FILENAME "${D3DCOMPILER_DLL}" NAME)
			list(APPEND GL_DEFINITIONS "-DD3DCOMPILER=\"\\\"${D3DCOMPILER_FILENAME}\\\"\"")

			mark_as_advanced(D3DCOMPILER_DLL)

			if(D3DCOMPILER_DLL STREQUAL "")
				message(FATAL_ERROR
					"To compile WITH_GL_ANGLE you need to set D3DCOMPILER_DLL to the file "
					"path of a copy of the DirectX redistributable DLL file: D3DCompiler_46.dll"
				)
			endif()

		endif()

	endif()

else()
	list(APPEND BLENDER_GL_LIBRARIES "${OPENGL_LIBRARIES}")

endif()

if(WITH_GL_EGL)
	list(APPEND GL_DEFINITIONS -DWITH_GL_EGL)

	if(WITH_SYSTEM_GLES)
		if(NOT OPENGLES_EGL_LIBRARY)
			message(FATAL_ERROR
				"Unable to find OpenGL ES libraries. "
				"Install them or disable WITH_SYSTEM_GLES."
			)
		endif()

		list(APPEND BLENDER_GL_LIBRARIES OPENGLES_EGL_LIBRARY)

	else()
		set(OPENGLES_EGL_LIBRARY "" CACHE FILEPATH "EGL library file")
		mark_as_advanced(OPENGLES_EGL_LIBRARY)

		list(APPEND BLENDER_GL_LIBRARIES "${OPENGLES_LIBRARY}" "${OPENGLES_EGL_LIBRARY}")

		if(NOT OPENGLES_EGL_LIBRARY)
			message(FATAL_ERROR
				"To compile WITH_GL_EGL you need to set OPENGLES_EGL_LIBRARY "
				"to the file path of an EGL library."
			)
		endif()

	endif()

	if(WIN32)
		# Setup paths to files needed to install and redistribute Windows Blender with OpenGL ES

		set(OPENGLES_EGL_DLL "" CACHE FILEPATH "EGL redistributable DLL file")
		mark_as_advanced(OPENGLES_EGL_DLL)

		if(NOT OPENGLES_EGL_DLL)
			message(FATAL_ERROR
				"To compile WITH_GL_EGL you need to set OPENGLES_EGL_DLL "
				"to the file path of an EGL runtime dynamic link library (DLL)."
			)
		endif()

	endif()

endif()

if(WITH_GL_PROFILE_ES20)
	list(APPEND GL_DEFINITIONS -DWITH_GL_PROFILE_ES20)
else()
	list(APPEND GL_DEFINITIONS -DWITH_GL_PROFILE_CORE)
endif()

if(WITH_GL_EGL)
	list(APPEND GL_DEFINITIONS -DWITH_EGL)
endif()

#-----------------------------------------------------------------------------
# Configure OpenMP.
if(WITH_OPENMP)
	find_package(OpenMP)
	if(OPENMP_FOUND)
		if(NOT WITH_OPENMP_STATIC)
			set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
			set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
		else()
			# Typically avoid adding flags as defines but we can't
			# pass OpenMP flags to the linker for static builds, meaning
			# we can't add any OpenMP related flags to CFLAGS variables
			# since they're passed to the linker as well.
			add_definitions("${OpenMP_C_FLAGS}")

			find_library_static(OpenMP_LIBRARIES gomp ${CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES})
		endif()
	else()
		set(WITH_OPENMP OFF)
	endif()

	mark_as_advanced(
		OpenMP_C_FLAGS
		OpenMP_CXX_FLAGS
	)
endif()

#-----------------------------------------------------------------------------
# Configure GLEW

if(WITH_SYSTEM_GLEW)
	find_package(GLEW)

	# Note: There is an assumption here that the system GLEW is not a static library.

	if(NOT GLEW_FOUND)
		message(FATAL_ERROR "GLEW is required to build Blender. Install it or disable WITH_SYSTEM_GLEW.")
	endif()

	set(BLENDER_GLEW_LIBRARIES ${GLEW_LIBRARY})
else()
	if(WITH_GLEW_ES)
		set(GLEW_INCLUDE_PATH "${CMAKE_SOURCE_DIR}/extern/glew-es/include")

		list(APPEND GL_DEFINITIONS -DGLEW_STATIC -DWITH_GLEW_ES)

		# These definitions remove APIs from glew.h, making GLEW smaller, and catching unguarded API usage
		if(WITH_GL_PROFILE_ES20)
			list(APPEND GL_DEFINITIONS -DGLEW_ES_ONLY)
		else()
			# No ES functions are needed
			list(APPEND GL_DEFINITIONS -DGLEW_NO_ES)
		endif()

		if(WITH_GL_PROFILE_ES20)
			if(WITH_GL_EGL)
				list(APPEND GL_DEFINITIONS -DGLEW_USE_LIB_ES20)
			endif()

			# ToDo: This is an experiment to eliminate ES 1 symbols,
			# GLEW doesn't really properly provide this level of control
			# (for example, without modification it eliminates too many symbols)
			# so there are lots of modifications to GLEW to make this work,
			# and no attempt to make it work beyond Blender at this point.
			list(APPEND GL_DEFINITIONS -DGL_ES_VERSION_1_0=0 -DGL_ES_VERSION_CL_1_1=0 -DGL_ES_VERSION_CM_1_1=0)
		endif()

		if(WITH_GL_EGL)
			list(APPEND GL_DEFINITIONS -DGLEW_INC_EGL)
		endif()

		set(BLENDER_GLEW_LIBRARIES extern_glew_es bf_intern_glew_mx)

	else()
		set(GLEW_INCLUDE_PATH "${CMAKE_SOURCE_DIR}/extern/glew/include")

		list(APPEND GL_DEFINITIONS -DGLEW_STATIC)

		# This won't affect the non-experimental glew library,
		# but is used for conditional compilation elsewhere.
		list(APPEND GL_DEFINITIONS -DGLEW_NO_ES)

		set(BLENDER_GLEW_LIBRARIES extern_glew)

	endif()

endif()

list(APPEND GL_DEFINITIONS -DGLEW_NO_GLU)

#-----------------------------------------------------------------------------
# Configure Bullet

if(WITH_BULLET AND WITH_SYSTEM_BULLET)
	find_package(Bullet)
	if(NOT BULLET_FOUND)
		set(WITH_BULLET OFF)
	endif()
else()
	set(BULLET_INCLUDE_DIRS "${CMAKE_SOURCE_DIR}/extern/bullet2/src")
	# set(BULLET_LIBRARIES "")
endif()

#-----------------------------------------------------------------------------
# Configure Python.

if(WITH_PYTHON_MODULE)
	add_definitions(-DPy_ENABLE_SHARED)
endif()

#-----------------------------------------------------------------------------
# Configure GLog/GFlags

if(WITH_LIBMV OR WITH_GTESTS OR (WITH_CYCLES AND WITH_CYCLES_LOGGING))
	if(WITH_SYSTEM_GFLAGS)
		find_package(Gflags)
		if(NOT GFLAGS_FOUND)
			message(FATAL_ERROR "System wide Gflags is requested but was not found")
		endif()
		# FindGflags does not define this, and we are not even sure what to use here.
		set(GFLAGS_DEFINES)
	else()
		set(GFLAGS_DEFINES
			-DGFLAGS_DLL_DEFINE_FLAG=
			-DGFLAGS_DLL_DECLARE_FLAG=
			-DGFLAGS_DLL_DECL=
		)
		set(GFLAGS_NAMESPACE "gflags")
		set(GFLAGS_LIBRARIES extern_gflags)
		set(GFLAGS_INCLUDE_DIRS "${PROJECT_SOURCE_DIR}/extern/gflags/src")
	endif()

	if(WITH_SYSTEM_GLOG)
		find_package(Glog)
		if(NOT GLOG_FOUND)
			message(FATAL_ERROR "System wide Glog is requested but was not found")
		endif()
		# FindGlog does not define this, and we are not even sure what to use here.
		set(GLOG_DEFINES)
	else()
		set(GLOG_DEFINES
			-DGOOGLE_GLOG_DLL_DECL=
		)
		set(GLOG_LIBRARIES extern_glog)
		if(WIN32)
			set(GLOG_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/extern/glog/src/windows)
		else()
			set(GLOG_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/extern/glog/include)
		endif()
	endif()
endif()

#-----------------------------------------------------------------------------
# Configure Ceres

if(WITH_LIBMV)
	# We always have C++11 which includes unordered_map.
	set(CERES_DEFINES -DCERES_STD_UNORDERED_MAP)
endif()

#-----------------------------------------------------------------------------
# Extra compile flags

if(CMAKE_COMPILER_IS_GNUCC)

	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_ALL -Wall)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_CAST_ALIGN -Wcast-align)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_ERROR_IMPLICIT_FUNCTION_DECLARATION -Werror=implicit-function-declaration)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_ERROR_RETURN_TYPE  -Werror=return-type)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_ERROR_VLA -Werror=vla)
	# system headers sometimes do this, disable for now, was: -Werror=strict-prototypes
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_STRICT_PROTOTYPES  -Wstrict-prototypes)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_MISSING_PROTOTYPES -Wmissing-prototypes)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_NO_CHAR_SUBSCRIPTS -Wno-char-subscripts)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_NO_UNKNOWN_PRAGMAS -Wno-unknown-pragmas)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_POINTER_ARITH -Wpointer-arith)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_UNUSED_PARAMETER -Wunused-parameter)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_WRITE_STRINGS -Wwrite-strings)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_LOGICAL_OP -Wlogical-op)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_UNDEF -Wundef)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_INIT_SELF -Winit-self)  # needs -Wuninitialized
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_NO_NULL -Wnonnull)  # C only
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_MISSING_INCLUDE_DIRS -Wmissing-include-dirs)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_NO_DIV_BY_ZERO -Wno-div-by-zero)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_TYPE_LIMITS -Wtype-limits)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_FORMAT_SIGN -Wformat-signedness)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_RESTRICT -Wrestrict)

	# gcc 4.2 gives annoying warnings on every file with this
	if(NOT "${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "4.3")
		ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_UNINITIALIZED -Wuninitialized)
	endif()

	# versions before gcc4.6 give many BLI_math warnings
	if(NOT "${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "4.6")
		ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_REDUNDANT_DECLS       -Wredundant-decls)
		ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_REDUNDANT_DECLS -Wredundant-decls)
	endif()

	# versions before gcc4.8 include global name-space.
	if(NOT "${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "4.8")
		ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_SHADOW -Wshadow)
	endif()

	# disable because it gives warnings for printf() & friends.
	# ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_DOUBLE_PROMOTION -Wdouble-promotion -Wno-error=double-promotion)

	if(NOT APPLE)
		ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_NO_ERROR_UNUSED_BUT_SET_VARIABLE -Wno-error=unused-but-set-variable)
	endif()

	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_ALL -Wall)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_INVALID_OFFSETOF -Wno-invalid-offsetof)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_SIGN_COMPARE -Wno-sign-compare)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_LOGICAL_OP -Wlogical-op)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_INIT_SELF -Winit-self)  # needs -Wuninitialized
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_MISSING_INCLUDE_DIRS -Wmissing-include-dirs)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_DIV_BY_ZERO -Wno-div-by-zero)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_TYPE_LIMITS -Wtype-limits)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_ERROR_RETURN_TYPE  -Werror=return-type)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_ERROR_IMPLICIT_FUNCTION_DECLARATION -Werror=implicit-function-declaration)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_CHAR_SUBSCRIPTS -Wno-char-subscripts)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_UNKNOWN_PRAGMAS -Wno-unknown-pragmas)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_POINTER_ARITH -Wpointer-arith)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_UNUSED_PARAMETER -Wunused-parameter)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_WRITE_STRINGS -Wwrite-strings)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_UNDEF -Wundef)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_FORMAT_SIGN -Wformat-signedness)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_RESTRICT -Wrestrict)

	# gcc 4.2 gives annoying warnings on every file with this
	if(NOT "${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "4.3")
		ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_UNINITIALIZED -Wuninitialized)
	endif()

	# causes too many warnings
	if(NOT APPLE)
		ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_UNDEF -Wundef)
		ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_MISSING_DECLARATIONS -Wmissing-declarations)
	endif()

	# Use 'ATTR_FALLTHROUGH' macro to suppress.
	if(CMAKE_COMPILER_IS_GNUCC AND (NOT "${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "7.0"))
		ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_IMPLICIT_FALLTHROUGH -Wimplicit-fallthrough=5)
		ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_IMPLICIT_FALLTHROUGH -Wimplicit-fallthrough=5)
	endif()

	# flags to undo strict flags
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_DEPRECATED_DECLARATIONS -Wno-deprecated-declarations)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_PARAMETER        -Wno-unused-parameter)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_FUNCTION         -Wno-unused-function)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_TYPE_LIMITS             -Wno-type-limits)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_INT_IN_BOOL_CONTEXT     -Wno-int-in-bool-context)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_FORMAT                  -Wno-format)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_SWITCH                  -Wno-switch)

	ADD_CHECK_CXX_COMPILER_FLAG(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_CLASS_MEMACCESS     -Wno-class-memaccess)

	if(CMAKE_COMPILER_IS_GNUCC AND (NOT "${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "7.0"))
		ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_IMPLICIT_FALLTHROUGH    -Wno-implicit-fallthrough)
	endif()

	if(NOT APPLE)
		ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_ERROR_UNUSED_BUT_SET_VARIABLE -Wno-error=unused-but-set-variable)
	endif()

elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")

	# strange, clang complains these are not supported, but then uses them.
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_ALL -Wall)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_ERROR_IMPLICIT_FUNCTION_DECLARATION -Werror=implicit-function-declaration)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_ERROR_RETURN_TYPE  -Werror=return-type)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_NO_AUTOLOGICAL_COMPARE -Wno-tautological-compare)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_NO_UNKNOWN_PRAGMAS -Wno-unknown-pragmas)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_NO_CHAR_SUBSCRIPTS -Wno-char-subscripts)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_STRICT_PROTOTYPES  -Wstrict-prototypes)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_MISSING_PROTOTYPES -Wmissing-prototypes)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_UNUSED_PARAMETER -Wunused-parameter)

	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_ALL -Wall)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_AUTOLOGICAL_COMPARE -Wno-tautological-compare)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_UNKNOWN_PRAGMAS     -Wno-unknown-pragmas)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_CHAR_SUBSCRIPTS     -Wno-char-subscripts)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_OVERLOADED_VIRTUAL  -Wno-overloaded-virtual)  # we get a lot of these, if its a problem a dev needs to look into it.
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_SIGN_COMPARE        -Wno-sign-compare)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_INVALID_OFFSETOF    -Wno-invalid-offsetof)

	# gives too many unfixable warnings
	# ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_UNUSED_MACROS      -Wunused-macros)
	# ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_UNUSED_MACROS          -Wunused-macros)

	# flags to undo strict flags
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_PARAMETER -Wno-unused-parameter)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_MACROS    -Wno-unused-macros)

	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_MISSING_VARIABLE_DECLARATIONS -Wno-missing-variable-declarations)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_INCOMPAT_PTR_DISCARD_QUAL -Wno-incompatible-pointer-types-discards-qualifiers)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNUSED_FUNCTION -Wno-unused-function)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_INT_TO_VOID_POINTER_CAST -Wno-int-to-void-pointer-cast)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_MISSING_PROTOTYPES -Wno-missing-prototypes)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_DUPLICATE_ENUM -Wno-duplicate-enum)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_UNDEF -Wno-undef)
	ADD_CHECK_C_COMPILER_FLAG(C_REMOVE_STRICT_FLAGS C_WARN_NO_MISSING_NORETURN -Wno-missing-noreturn)

	ADD_CHECK_CXX_COMPILER_FLAG(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_PRIVATE_FIELD -Wno-unused-private-field)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_CXX11_NARROWING -Wno-c++11-narrowing)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_NON_VIRTUAL_DTOR -Wno-non-virtual-dtor)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_UNUSED_MACROS -Wno-unused-macros)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_REMOVE_STRICT_FLAGS CXX_WARN_NO_REORDER -Wno-reorder)

elseif(CMAKE_C_COMPILER_ID MATCHES "Intel")

	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_ALL -Wall)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_POINTER_ARITH -Wpointer-arith)
	ADD_CHECK_C_COMPILER_FLAG(C_WARNINGS C_WARN_NO_UNKNOWN_PRAGMAS -Wno-unknown-pragmas)

	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_ALL -Wall)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_INVALID_OFFSETOF -Wno-invalid-offsetof)
	ADD_CHECK_CXX_COMPILER_FLAG(CXX_WARNINGS CXX_WARN_NO_SIGN_COMPARE -Wno-sign-compare)

	# disable numbered, false positives
	set(C_WARNINGS "${C_WARNINGS} -wd188,186,144,913,556,858,597,177,1292,167,279,592,94,2722,3199")
	set(CXX_WARNINGS "${CXX_WARNINGS} -wd188,186,144,913,556,858,597,177,1292,167,279,592,94,2722,3199")
elseif(CMAKE_C_COMPILER_ID MATCHES "MSVC")
	# most msvc warnings are C & C++
	set(_WARNINGS
		# warning level:
		"/W3"
		"/w34062"  # switch statement contains 'default' but no 'case' labels
		"/w34189"  # local variable is initialized but not referenced
		# disable:
		"/wd4018"  # signed/unsigned mismatch
		"/wd4146"  # unary minus operator applied to unsigned type, result still unsigned
		"/wd4065"  # switch statement contains 'default' but no 'case' labels
		"/wd4127"  # conditional expression is constant
		"/wd4181"  # qualifier applied to reference type; ignored
		"/wd4200"  # zero-sized array in struct/union
		"/wd4244"  # conversion from 'type1' to 'type2', possible loss of data
		"/wd4267"  # conversion from 'size_t' to 'type', possible loss of data
		"/wd4305"  # truncation from 'type1' to 'type2'
		"/wd4800"  # forcing value to bool 'true' or 'false'
		"/wd4828"  # The file contains a character that is illegal
		"/wd4996"  # identifier was declared deprecated
		# errors:
		"/we4013"  # 'function' undefined; assuming extern returning int
		"/we4133"  # incompatible pointer types
		"/we4431"  # missing type specifier - int assumed
	)

	if(MSVC_VERSION GREATER_EQUAL 1911)
		# see https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/c5038?view=vs-2017
		set(_WARNINGS "${_WARNINGS} /w35038") #order of initialisation in c++ constructors
	endif()

	string(REPLACE ";" " " _WARNINGS "${_WARNINGS}")
	set(C_WARNINGS "${_WARNINGS}")
	set(CXX_WARNINGS "${_WARNINGS}")
	unset(_WARNINGS)
endif()

# ensure python header is found since detection can fail, this could happen
# with _any_ library but since we used a fixed python version this tends to
# be most problematic.
if(WITH_PYTHON)
	if(NOT EXISTS "${PYTHON_INCLUDE_DIR}/Python.h")
		message(FATAL_ERROR
			"Missing: \"${PYTHON_INCLUDE_DIR}/Python.h\",\n"
			"Set the cache entry 'PYTHON_INCLUDE_DIR' to point "
			"to a valid python include path. Containing "
			"Python.h for python version \"${PYTHON_VERSION}\""
		)
	endif()

	if(WIN32 OR APPLE)
		# Windows and macOS have this bundled with Python libraries.
	elseif((WITH_PYTHON_INSTALL AND WITH_PYTHON_INSTALL_NUMPY) OR (WITH_AUDASPACE AND NOT WITH_SYSTEM_AUDASPACE))
		if(("${PYTHON_NUMPY_PATH}" STREQUAL "") OR (${PYTHON_NUMPY_PATH} MATCHES NOTFOUND))
			find_python_package(numpy)
			unset(PYTHON_NUMPY_INCLUDE_DIRS CACHE)
			set(PYTHON_NUMPY_INCLUDE_DIRS ${PYTHON_NUMPY_PATH}/numpy/core/include CACHE PATH "Path to the include directory of the numpy module")
			mark_as_advanced(PYTHON_NUMPY_INCLUDE_DIRS)
		endif()
	endif()

	if(WIN32 OR APPLE)
		# pass, we have this in lib/python/site-packages
	elseif(WITH_PYTHON_INSTALL_REQUESTS)
		find_python_package(requests)
	endif()
endif()

if(
	CMAKE_COMPILER_IS_GNUCC OR
	CMAKE_C_COMPILER_ID MATCHES "Clang" OR
	CMAKE_C_COMPILER_ID MATCHES "Intel"
)
	# TODO(sergey): Do we want c++11 or gnu-c++11 here?
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
elseif(MSVC)
	# Nothing special is needed, C++11 features are available by default.
else()
	message(FATAL_ERROR "Unknown compiler ${CMAKE_C_COMPILER_ID}, can't enable C++11 build")
endif()

# Visual Studio has all standards it supports available by default
# Clang on windows copies this behavior and does not support these switches
if(
	CMAKE_COMPILER_IS_GNUCC OR
	(CMAKE_C_COMPILER_ID MATCHES "Clang" AND (NOT MSVC)) OR
	(CMAKE_C_COMPILER_ID MATCHES "Intel")
)
	# Use C11 + GNU extensions, works with GCC, Clang, ICC
	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu11")
endif()

# Include warnings first, so its possible to disable them with user defined flags
# eg: -Wno-uninitialized
set(CMAKE_C_FLAGS "${C_WARNINGS} ${CMAKE_C_FLAGS} ${PLATFORM_CFLAGS}")
set(CMAKE_CXX_FLAGS "${CXX_WARNINGS} ${CMAKE_CXX_FLAGS} ${PLATFORM_CFLAGS}")

# defined above, platform specific but shared names
mark_as_advanced(
	CYCLES_OSL
	OSL_LIB_EXEC
	OSL_COMPILER
	OSL_LIB_COMP
	OSL_LIB_QUERY
	OSL_INCLUDE_DIR
)

mark_as_advanced(
	LLVM_CONFIG
	LLVM_ROOT_DIR
	LLVM_LIBRARY
	LLVM_VERSION
)

#-------------------------------------------------------------------------------
# Global Defines

# better not set includes here but this debugging option is off by default.
if(WITH_CXX_GUARDEDALLOC)
	include_directories(${CMAKE_SOURCE_DIR}/intern/guardedalloc)
	add_definitions(-DWITH_CXX_GUARDEDALLOC)
endif()

if(WITH_ASSERT_ABORT)
	add_definitions(-DWITH_ASSERT_ABORT)
endif()

# message(STATUS "Using CFLAGS: ${CMAKE_C_FLAGS}")
# message(STATUS "Using CXXFLAGS: ${CMAKE_CXX_FLAGS}")

#-----------------------------------------------------------------------------
# Libraries

if(WITH_GTESTS)
	include(GTestTesting)
endif()

if(WITH_BLENDER)
	add_subdirectory(intern)
	add_subdirectory(extern)

	# source after intern and extern to gather all
	# internal and external library information first, for test linking
	add_subdirectory(source)
elseif(WITH_CYCLES_STANDALONE)
	add_subdirectory(intern/cycles)
	add_subdirectory(extern/clew)
	if(WITH_CUDA_DYNLOAD)
		add_subdirectory(extern/cuew)
	endif()
	if(NOT WITH_SYSTEM_GLEW)
		add_subdirectory(extern/glew)
	endif()
endif()

#-----------------------------------------------------------------------------
# Blender Application
if(WITH_BLENDER)
	add_subdirectory(source/creator)
endif()


#-----------------------------------------------------------------------------
# Testing
add_subdirectory(tests)


#-----------------------------------------------------------------------------
# CPack for generating packages
include(build_files/cmake/packaging.cmake)

#-----------------------------------------------------------------------------
# Use dynamic loading for OpenMP
if(WITH_BLENDER)
	openmp_delayload(blender)
endif()

#-----------------------------------------------------------------------------
# Print Final Configuration

if(FIRST_RUN)

	set(_config_msg "\nBlender Configuration\n=====================")

	function(info_cfg_option
		_setting
		)

		set(_msg "  - ${_setting}")
		string(LENGTH "${_msg}" _len)
		while("32" GREATER "${_len}")
			set(_msg "${_msg} ")
			math(EXPR _len "${_len} + 1")
		endwhile()

		set(_config_msg "${_config_msg}\n${_msg}${${_setting}}" PARENT_SCOPE)
	endfunction()

	function(info_cfg_text
		_text
		)

		set(_config_msg "${_config_msg}\n\n  ${_text}" PARENT_SCOPE)
	endfunction()

	message(STATUS "C Compiler:   \"${CMAKE_C_COMPILER_ID}\"")
	message(STATUS "C++ Compiler: \"${CMAKE_CXX_COMPILER_ID}\"")

	info_cfg_text("Build Options:")
	info_cfg_option(WITH_BULLET)
	info_cfg_option(WITH_IK_SOLVER)
	info_cfg_option(WITH_IK_ITASC)
	info_cfg_option(WITH_OPENCOLLADA)
	info_cfg_option(WITH_FFTW3)
	info_cfg_option(WITH_INTERNATIONAL)
	info_cfg_option(WITH_INPUT_NDOF)
	info_cfg_option(WITH_CYCLES)
	info_cfg_option(WITH_FREESTYLE)
	info_cfg_option(WITH_OPENCOLORIO)
	info_cfg_option(WITH_OPENVDB)
	info_cfg_option(WITH_ALEMBIC)

	info_cfg_text("Compiler Options:")
	info_cfg_option(WITH_BUILDINFO)
	info_cfg_option(WITH_OPENMP)
	info_cfg_option(WITH_RAYOPTIMIZATION)

	info_cfg_text("System Options:")
	info_cfg_option(WITH_INSTALL_PORTABLE)
	info_cfg_option(WITH_X11_ALPHA)
	info_cfg_option(WITH_X11_XF86VMODE)
	info_cfg_option(WITH_X11_XFIXES)
	info_cfg_option(WITH_X11_XINPUT)
	info_cfg_option(WITH_MEM_JEMALLOC)
	info_cfg_option(WITH_MEM_VALGRIND)
	info_cfg_option(WITH_SYSTEM_GLEW)

	info_cfg_text("Image Formats:")
	info_cfg_option(WITH_OPENIMAGEIO)
	info_cfg_option(WITH_IMAGE_CINEON)
	info_cfg_option(WITH_IMAGE_DDS)
	info_cfg_option(WITH_IMAGE_HDR)
	info_cfg_option(WITH_IMAGE_OPENEXR)
	info_cfg_option(WITH_IMAGE_OPENJPEG)
	info_cfg_option(WITH_IMAGE_TIFF)

	info_cfg_text("Audio:")
	info_cfg_option(WITH_OPENAL)
	info_cfg_option(WITH_SDL)
	info_cfg_option(WITH_SDL_DYNLOAD)
	info_cfg_option(WITH_JACK)
	info_cfg_option(WITH_JACK_DYNLOAD)
	info_cfg_option(WITH_CODEC_AVI)
	info_cfg_option(WITH_CODEC_FFMPEG)
	info_cfg_option(WITH_CODEC_SNDFILE)

	info_cfg_text("Compression:")
	info_cfg_option(WITH_LZMA)
	info_cfg_option(WITH_LZO)

	info_cfg_text("Python:")
	info_cfg_option(WITH_PYTHON_INSTALL)
	info_cfg_option(WITH_PYTHON_INSTALL_NUMPY)
	info_cfg_option(WITH_PYTHON_MODULE)
	info_cfg_option(WITH_PYTHON_SAFETY)
	if(APPLE)
		info_cfg_option(WITH_PYTHON_FRAMEWORK)
	endif()

	info_cfg_text("Modifiers:")
	info_cfg_option(WITH_MOD_REMESH)
	info_cfg_option(WITH_MOD_FLUID)
	info_cfg_option(WITH_MOD_OCEANSIM)

	info_cfg_text("OpenGL:")
	info_cfg_option(WITH_GLEW_ES)
	info_cfg_option(WITH_GL_EGL)
	info_cfg_option(WITH_GL_PROFILE_ES20)
	if(WIN32)
		info_cfg_option(WITH_GL_ANGLE)
	endif()

	info_cfg_text("")

	message("${_config_msg}")
endif()

if(0)
	print_all_vars()
endif()
